14 I have been referred to a number of cases which have considered applications to reopen cases after judgment has been delivered which have emphasised that this should be done only in very limited circumstances. In Urban Transport Authority of New South Wales v Nweiser (1992) 28 NSWLR 471 the Defendant sought to reopen its case because of a mistake on the part of its counsel. The Court of Appeal unanimously held at 475 that a case may be reopened where the evidence is clearly relevant to, and may have a significant impact on, the issues in the case.
15 In Metwally (No 2) v University of Wollongong (1985) 60 ALR 68 the High Court unanimously held at 70 that it had the power to vacate a perfected order but that "if such power exists, it must be exercised with great caution". It further held at 71 that a party is bound by the conduct of his or her case, and that only in the most exceptional circumstances should a new argument be allowed to be raised after the case had been decided. This was referred to by the majority of the High Court in Coulton v Holcombe (1986) 162 CLR 1 at 8, and upheld at 11. In De L v Director-General, NSW Department of Community Services (No 2) (1997) 190 CLR 207, the Director-General applied to vacate a costs order before a judgement was perfected but after it had been handed down. The majority of the High Court held at 215 that the Court can reopen its judgments or orders if there is some matter calling for review or where it is in the interests of justice to do so, but further held at 223 that a Court should be reluctant to do so where the party seeking relief to reopen has not done all it could to raise the point at a more appropriate time.
16 Finally, in Mir Bros Unit Constructions Pty Limited v Roads and Traffic Authority of New South Wales [2005] NSWLEC 419, where an application was made to reopen the case ten months after judgment was handed down, this Court held that leave to reopen should not be granted where a deliberate decision was made during the hearing to exclude the evidence. Where there was no previous impediment to bringing in the evidence, and where no explanation for the delay has been offered, the Court should not allow the matter to be reopened. The application to reopen in that case was refused.